Centrifugal separating machine



Oct. 27, 1936. J 5, PECKER 2,058,497

CENTRIFUGAL SEPARATING MACHINE Filed April 28, 1934 4Sheets-Sheet 1 3 il8% l as 87 as 97 53 8 69 7% so 3 4 59 38 37\ 60 5 55 6 V /37 12. H G I0H H-s O a 9 25 Hz 2/ 032 g J \N 27 77 75 3s 9 33 ATTORNEY.

1936- J. s. PECKER CENTRIFUGAL SEPARATING MACHINE Filed April 28, 1934 4Sheets-Sheet 2 12W TOR.

Oct. 27, 1936. J. s. PECKER CENTRIFUGAL SEPARATING MACHINE Filed April28, 1934 4 SheefCs-Sheet 3 ATTORNEY.

Oct.27, 1936. J PECKER v '2,058,497

CENTiRIFUGAL SEPARATING MACHINE 4 Sheets-Sheet 4 ATTORNEY.

Patented Oct. 27, 1936 UNITED STATES PATENT OFFICE Joseph S. Pecker,Philadelphia, Pa., assignor to American Centrifugal Corporation, NewYork, N. Y., a corporation of Delaware Application April 28, 1934.Serial No. 122.952

29 Claims.

the liquids and solids, means being also provided forgiving the effluentcollecting in the tank the clarified to the desired or necessary degreeprior to draining it from the tank. a

A further object of the invention is to provide an automatic centrifugalseparating machine of this character wherein purging and cleaning areperformed at high speed and the effluent ,discharged substantiallytangentially through seepage means upon an annular series of vanesadapted through the reaction of the discharge effluent to conserveenergy and at the same time dissipate the force of the impact of theefiluent and facilitate collecting the same and delivering the eiiluentto the collecting and sedimentation tank.

Another object of the invention is to provide a centrifugal separatingmachine having a horizontal rotary centrifugal basket provided withvalve controlled sludge discharge ports and equipped with exteriorlyarranged means for sweeping extruded solids to a sludge outlet openingand for expelling such extruded sludge tangentially through the outletopening.

A further object of the invention is to provide a centrifugal separatingmachine having a horizontal rotary centrifugal basket and provided atthe ends'thereof with means for feeding the material from thesuperimposed tank into the basket to distributing means adapted throughcentrifugal action to spread the material and throw the same to theperipheral portions of the basket.

A further object of the invention is to provide a centrifugal separatingmachine having a rotary horizontal centrifugal basket divided into twosymmetrical chambers into which the material to be dewatered may be fedeither simultaneously or independently and distributed centrifugally tothe peripheral portions of the chamdesired treatment so that theeffluent may be truded at the inner portions of the said chambers sothat the purging and cleaning periods of the two chambers may coincideor one chamber may be purging while the other is extruding the drysolids and vice versa. I

A further object of the invention" is to provide a centrifugalseparating machine having a mixing chamber provided with means forthoroughly beating, cutting, stirring and agitating the mate-- rial tobe dewatered prior to its introduction into i the rotary centrifugalbasket and also having means for feeding to the mixing chamberchemicals, steam, air, inert material such as pulp, sawdust or'sand orany other reagent to facilitate effective separation of solid and liquidmatter in the rotary centrifugal basket.

, With these and other objects in view, the invention consists in theconstruction and-novel combination and arrangement of parts hereinafterfully described, illustrated in the accompanying drawings and pointedout in the claims hereto appended, it being understood that variouschanges in the form, proportion and minor details of construction,within the 1 scope of the claims, may be resorted to without departingfrom the spirit or sacrificing any of the ad-' vantages of theinvention.

In the drawings:-

Fig. 1 is a central vertical sectional view of a centrifugal separatingmachine constructed in accordance with this invention.

Fig. 2 is a vertical sectional view on the line 22 of Fig. 1.

Fig. 3 is a horizontal sectional view on the line 3-3 of Fig. 2, partsbeing omitted.

Fig.'4 is a vertical sectional view on the line 4-4 of Fig. 1..

Fig. 5 is a vertical sectional view on the line 5-5 of Fig. 1.

Fig. 6 is avertical sectional view on the line 66 of Fig. 1.

Fig. 7 is a detail sectional view of a portion of the rotary centrifugalbasket showing the valve arranged for purging in the left hand chamberof the basket and for extruding dry sludge from, the right hand chamberof the basket.

Fig. 8 is a similar view showing the valve arranged for purging in theright hand chamber of the basket and for extruding dry sludge from theleft hand chamber of the basket.

In the accompanying drawings in which is illustrated the preferredembodiment of the invention the centrifugal separating machine comprisesin its construction a frame or casing preferably provided with asubstantially cylindrical housing I divided approximately centrally intoupper and lower sections 2 and 3 and having a hollow supporting base 4and a superimposed tank I preferably formed integral respectively withthe lower section 3 and the upper section 2, but the frame or casing maybe constructed in any other suitable manner as will be readilyunderstood. The meeting edges of the upper and lower approximatelysemi-cylindrical sections 2 and 3 of the housing are provided withoutwardly extending horizontal marginal flanges 6 and I which aredesigned to be detachably bolted together for enabling the sections tobe readily separated and assembled.

The cylindrical housing is provided with removable side plates 3 ofsubstantially circular form bolted at their marginal portions 3 to thesections 2 and 3 at the side edges thereof and adapted to be readilyassembled and removed to permit the assembling and removing of ahorizontal rotary centrifugal basket Ill. The side plates 3 are providedat their inner faces with inwardly extending annular flanges l Isubstantially L-shaped in cross section and forming annular eilluenttroughs l2 arranged to receive seepage from the rotary centrifugalbasket.

The side plates are provided at their upper portions with approximatelysemi-circular flanges l3 arranged in parallelismwith the adjacentportions of the flanges II and curved in cross section to form groovesl4 arranged concentric with the troughs and adapted to receive eilluentand facilitating the collecting of the same and the delivery of theeilluent to the tank I 5 formed by the hollow base 4. The curved flangesl3 extend around the upper portions of the side plates 3 and the flangesII are provided at the lower portions of the side plates withapproximately semicircular grooves i6 located in the bottom of theannular troughs l2 and receiving therefromthe seepage which is conductedto the tank l5 by side drain pipes I 1 arranged exteriorly of thehousing at opposite sides thereof and communicating with the interior ofthe same and with the tank, as clearly illustrated in Fig. 1 ofthe-drawings. The flanges II are provided within the troughs l2 with anannular series of vanes l8 spaced apart, as clearly illustrated in Fig.4 of the drawings. and curved inwardly of the housing and adapted topresent concave faces to the seepage discharge by the rotary centrifugalbasket, as illustrated in Fig. 4 of the drawings, in which the arrowindicates the direction of rotation of the centrifugal basket withrelation to the vanes. The vanes are adapted to receive the impact ofthe eflluent which is discharged tangentially against the concavesurfaces of the vanes to conserve energy and to facilitate collectingthe seepage anddraining the same into the tank l6.

At the same time the seepage is agitated and aerated to facilitatesettling and clarification of the same in the tank ii. 'The side drainpipes II are preferably L-shaped, asshown, with their terminals suitablysecured in openings in the side plates 3 and the top of the tank l5suitable unions it being provided for facilitating the assembling of thedrain pipes and their removal should the same become necessary.

The horizontal rotary centrifugal basket consists of a substantiallycylindrical body portion taperedfrom the center to the sides of themachine and provided at the center with a vertical web 23 dividing thecentrifugal basket into two side chambers 2|. The centrifugal basket isprovided at the outer smaller ends of the chambers 2| access? withannular seepage plates 22 constructed substantially the same as theseepage plate shown and described in my co-pending application SerialNo. 712,390, filed February 21, 1934, and bolted or otherwise secured tothe ends of the oppositely tapered body portion of the rotary basket.The seepage plates are provided with channels or passages 23 arranged todischarge the seepage tangentially from the rotary centrifugal basket,as indicatedin Fig. 4 of the drawings.

The seepage plates 22 are provided with screens 24 constructedsubstantially the same as those shown and described in the aforesaidapplication and adapted to prevent the seepage openings or passages frombecoming clogged by fibers contained in the material operated on by thecentrifugal basket. As the particular construction of the seepage meansis not claimed in the present application but is claimed in the saidapplication and as seepage means of any desired construction may beemployed further description and detail illustration thereof are deemedunnecessary in the present application. The seepage passages extendoutwardly and discharge the seepage at an angle to the radiusintersecting the outer end of the seepage passage so that in therotation of the centrifugal basket the seepage is dischargedapproximately tangentially from the basket against the said vanes l8.

The annular seepage plates which form the end walls of the horizontalrotary centrifugal basket provide central openings 25 through whichextend the ends of a horizontal shaft 26 upon which the rotarycentrifugal basket is mounted. The central vertical web 20 of the basketis provided with an integral hub 21 which is mounted on a centralcylindrical portion 28 of the horizontal shaft 26.

The shaft 26 which is mounted in suitable bearlugs 23 and 30 is providedat the ends of the cylindrical portions 28 with reductions 3| on whichare mounted vertically disposed distributing disks 32 provided. withcentral hubs 33 and secured against the ends of the hub 21 by nuts 34arranged on threaded portions 35 of the shaft 26, washers 36 beingpreferably interposed between the nuts and the distributing disks 32, asclearly illustrated in Fig. 1 of the drawings. The threaded portions 35of the shaft 26 are of a slightly less diameter than the cylindricalportions 3| and are of slightly greater diameter than the end portionsof the said shaft 26. The centrifugal basket is preferably keyed to theshaft as shown in Fig. 2 of the drawings, and any other suitable meansmay, of course, be employed for securing the distributing disks to thehorizontal shaft 26. The bearings 29 and 30 which are mounted on theside plates 8 may be of any desired construction and the material to bedewatered is fed to the chambers 2| of the rotary centrifugal basket bymeans of side feed pipes 31 having upper and lower arms 38 and 39 andprovided between the same with a standard valve 40 for controlling theflow of material through the side feed pipes 31. The upper arms 38 ofthe side feed pipes are secured to the tank 5 at the ends thereof andthe end walls of the tank are provided at the bottom with openings IIfor permitting material after the same has been operated on within thetank to be fed from the lower portion of the tank to the centrifugalbasket.

The upper arms 38 are preferably flanged and bolted to the end walls ofthe tank, but any other means may, of course be employed for thispurpose, and the lower arms 33 which are slightly inclined extendthrough the central openings in the end walls of the basket into thechambers 2| and are provided with laterally deflected verticallyelongated nozzles 42 set at an angle and arranged to discharge thematerial against the outer faces of the vertical distributing disks 32whereby thevdisks through their rotation with the centrifugal basket areadapted to throw the material radially to the peripheral portions of thecentrifugal basket. A uniform distribution within the centrifugal basketof the material to be dewatered by the same is effected through thefeeding of the material to the vertical distributing disks. and thematerial is simultaneously fed into the basket at opposite sides of themachine. The valves 40 are of the standard type and are designed to beoperated automatically at definite periods, as explained in theaforesaid application. The side plates 8 are provided at their upperportions with openings 43 for the passage of the lower arms 39 of theside feed pipes which are preferably located above the bearings 29 andfor delivering the material to the distributing disks at the upperportions thereof.

The rotary centrifugal basket is provided in its cylindrical bodyportion with annular series of tapered outwardly flared sludge dischargeports .44 located at the inner larger ends of the chambers 2| so-thatthe peripheral walls of the chambers increase in diameter towards theannular series of ports 44 and slope towards the same to assist in thedischarge of the sludge through the said ports by the centrifugal actionof the machine when a sufficient quantity of the substantially dewateredsludge has accumulated in a cake on the sloping walls of the basket. Thedischarge of the dewatered sludge through the annular series of ports 44is controlled by a valve consisting of a cylindrical sleeve 45 providedwith openings 46 and 41 adapted through the sliding of the valve on thebasket longitudinally of the body portion thereof to carrythe openings46 and 41 into and out of register with the openings 44 of thecentrifugal basket. The valve sleeve 45 is guided by keys 46 mounted onthe body portion of the basket at the exterior thereof and arranged inslots 41 in the valve sleeve 45, but any other suitable means may, ofcourse, be employed for guiding the valve sleeve in its sliding movementlongitudinally of the body portion of the basket. The valve sleeve 45 isprovided at one side portion of the basket with an extension 48 havingspaced annular flanges 49 forming a groove 50 for the reception of shoes5| which are providedwithpivots 52 for connecting the shoes to the lowerends 53 of arms 54 of a horizontal rock shaft 55.

The rock shaft 55 which is located above the basket and which isdisposed transversely with relation to the body portion of the basket isjournaled in suitable bearings 56 in the upper section 2 of the housingI at opposite sides thereof, as clearly illustrated in Fig. 2 of thedrawings, and the arms 54 which extend downwardly from the rock shaft 55are curved concentric with the rotary centrifugal basket and areprovided at their lower ends 53 with suitable bearing openings for thereception of the pivots 52 of the shoes which loosely engage the groove50 and permit rotary movement of the valve without interfering with thepivotal connection between the shoes 5| and the arms 54 of the rockshaft 55. The rock shaft 55 is provided at one end with 'a crank disk 51having a wrist pin 58 for connecting the rock shaft with suitableoperating mechanism which may be an electrical,

pneumatic or hydraulic control for operating the valve at predeterminedintervals and as any suitable control mechanism may be provided foroperating the rock shaft 55 illustration thereof is deemed unnecessary.u

The dry or dewatered sludge exuded through the ports 44 is dischargedinto an annular sludge trough formed by spaced annular flanges 5'8 and59 located within the cylindrical housing I and formed integral with theupper and lower sections thereof and providing an annular passageway forthe said dry or dewatered sludge.

The dry'or dewatered sludge exuded through theports 44 is swept aroundthe annular channel 60 by revolving blades 6| carried by the centrifugalbasket in the rotary movement thereof and preferably formed integralwith and extending radially from the valve sleeve 45, as clearlyillustrated in Fig. 5 of the drawings. The centrifugal basket and thevalve sleeve rotate in the direc-' tion of the arrow in Fig. 2 of thedrawings and the blades 6| present flat faces to the exuded sludge andextend from the valve sleeve to within close proximity to the wall ofthe annular sludge channel 60. These blades are preferably braced bywebs 62 formed integral with the blades and with the valve sleeve, butany other suitable construction of blade may, of course, be provided forsweeping the sludge around the annular channel 60 between the rotarycentrifugal basket and the housing which is provided at the bottom ofthe said annular space at one side of the machine with a-sludge outlet63 through which the sludge is discharged tangentially throughcentrifugal action and also the mechanical action of the blades 6|. Anysuitable means maybe provided for conveying the sludge from the machine.

ing a branch or section 65 extending into the tank and provided with astand pipe inlet 66 extending upwardly to the upper portion of the tankl5 to receive the overflow when the liquid within the tank rises abovethe upper end of the stand pipe inlet of .the drain pipe 64.

The tank is also provided at its lower portion with a sedimentationsludge drain pipe 61 communicating with the interior of the tank at thelower portion thereof, as clearly illustrated in Fig. 2 of the drawings.The sedimentation sludge may be permitted to drain from the tank l5 orit may be removed by vacuum means and the latter may also be employedfor removing the clear er eflluent if desired as explained and claimedin my copending application filed April 12. 1934; Serial No. 720,333.The tank is also provided at the top with an inlet 68 adapted to permitthe efliuent within the tank l5 to be treatedchemically, with currentsof air or any other means, for purifying and clarifying theefliuent sothat the efliuent when drawn oif through the clear effluent drain pipes54 will be in as unobjectionable condition as desired. v-

The superimposed tank which is preferably provided with a curved bottom69 has vertical side and end walls and is provided in its end walls withsuitable bearings 10 and II for the reception of a horizontal shaft 12provided with revolving cutters l3 fixed to the shaft at spaced pointsand arranged to cooperate with stationary vertical cutters 14 mountedupon and extending vertical cutter blades I4 are arranged at intervalsto provide spaces for the revolving cutter blades which pass through thespaces between the stationary cutter blades. The stationary cutterblades are preferably arranged in a straight row, as shown, and the endcutters of the stationary row are spaced from the end walls of the tankto provide the necessary space for the end cutters of the horizontalshaft. The revolving cutter blades of the horizontal shaft arepreferably staggered and arranged alternately at dia-,

metrically opposite points on the same. The revolving cutter blades" ofthe shaft 12 tend to cut and mix the material as they revolve and theycoact with the stationary blades in this mixing and cutting of thematerial, thoroughly.

beating, cutting, stirring and agitating the sludge prior to emissionfrom the tank to the centrifugal basket for dewatering. The cutterblades which are straight are beveled at their side edges and tapered attheir outer ends to provide cutting edges which are curved at theirouter terminals.

The horizontal shaft 28 upon which the rotary basket is mounted isconnectedby a standard type flexible coupling I5 with shaft 18 of anelectric motor Tl which rotates the centrifugal basket at high speed forboth purging and cleaning. Any other suitable means may, of course, beemployed for connecting the shaft I8 of the motor with the horizontalshaft 28 of the rotary basket.

The motor 11 is mounted on a suitable pedestal 18 which is supported bythe base 4 and the clutch which couples the motor to. the shaft 28 anduncouples the basket from the motor may be of any desired constructionand as an ordinary clutch mechanism is employed detailed description andillustration thereof is deemed unnecessary.

The motor is located at one side of the machine and the shaft 28 isprovidedat the opposite side thereof with a sprocket pinion 19 whichmeshes with a sprocket chain 88 and the latter is arranged on a sprocketwheel 8| suitably connected with one end of the shaft 12. While sprocketgearing is illustrated for transmitting motion from the basket carryingshaft to the" shaft 12 any other suitable gearing may, of

course, be provided and in practice a suitable 'clutch will be providedfor connecting the sprockreception of auxiliary pipes 88 and 89 for en-'abling air, steam, chemicals, pulp or other inert material reagent forpreparing the sludge for effective separation.

The top 84 of the tank 5 is slightly domeshaped as shown in Figs. 1 and2 of the drawings,

and is provided at the opening 83 with an annular boss into which anipple 98 of the fitting is suitably secured and the said fitting isprovided at the annular boss with a flange 9| which fits against theboss and supports the fitting. Any other suitable means, may however, beemployed for connecting the main feed pipe 82 and the auxiliary pipes 88and 89 with the tank.

In the operation of the machine the sewage or other material to bedewatered is fed into the tank through the main feed pipe 82 and isoperated on by the cutting blades and during such operation the materialmay be chemically or otherwise treated for preparing it for effectiveseparation of the liquid and solid matter. After thoroughly beating,cutting, stirring and agitating the material the mixed sludge is drawnofi through the valves 48 and conveyed by the side feed pipes to thechambers of the horizontal ro- "tary centrifugal basket and isdischarged against the vertically dispnmed revolving distributing diskswhich throw the material through centrifugal action to the peripheralportions of the basket.

During the feeding of the material into the chambers of the centrifugalbasket the sludge discharge ports thereof are closed and the material isfed continuously while the basket is rotating at high speed until a cakeof sufiicient thickness has been built up on the walls of the bodyportion of the basket.

At this point the automatic valves will shut off the flow of material tothe centrifugal basket and the sliding cylindrical valve will beoperated to carry the openings 48 and 41 into registration with theannular series of sludge discharge ports 48. The sludge will be extrudedthrough the sludge discharge ports by the action of centrifugal forceaided by the inclined surfaces formed by the oppositely tapered portionsof the body of the basket. As the sludge is thrown out radially throughthe ports of the centrifugal basket it will be confined in the channel88 formed by the spaced annular ribs or flanges 58 and 59 and will beswept around the cylindrical housing by the blades 8| and dischargedtangentially through the opening 83 through centrifugal action and alsothrough the mechanical action of the sludge sweeping blades 6|.

The seepage means operates at right angles to the direction of thecentrifugal force for permitting the escape from the basket of seepageof liquids from the solid material impacted on the imperforate taperingwalls of the basket and the eflluent is discharged substantiallytangentially from the peripheries of the annular end plates of thebasket against the annular series of vanes for the purposes heretoforeexplained.

The ellluent is drained off into the tank 15 and is permitted to settletherein so that the clearer efiluent can be drawn off through the standpipe inlet 88 of the clear eilluent drain 88. The effluent in the tankmay be treated with chemicals through the inlet pipe 88 or flocculatedby the injection of air through the said pipe 88 or some other suitableinlet. The sedimentation sludge may be drawn off through the drain pipe81 which is connected with the tank adjacent the bottom thereof.

The machine is designed to be continuous in its operation and thepurging and cleaning operations are performed at'high speed and inpractice suitable control mechanism will be employed for automaticallyoperating the valves for controlling the feed of material to thechambers of the basket and for also opening and closing the slidablesleeve valve which controls the sludge discharge ports. I

In order to adapt the valve sleeve 45 for controlling the sludgedischarge ports of the rotary centrifugal basket so that the purgingoperation may be performed in either chamber of the basket while the drysludge is being extruded from the other chamber of the basket, the saidvalve sleeve is provided with an annular series of openings 41' theright hand chamber of the basket while the operation of purging istaking place in the left hand chamber of the basket, the sludgedischarge ports thereof being covered or closed by a portion of theslidable sleeve. The openings 41 are adapted, as illustrated in Fig. 8of the drawings, to be carried into register with the sludge dischargeports of the left hand chamber of the basket, as shown in Fig. 8, whilethe sludge discharge ports M of the right hand chamber are covered orclosed by the sleeve. valve will enable the'sludge to be extruded fromthe left hand chamber of the basket while the operation of purging istaking place within the right hand chamber of the basket.

What is claimed is:-

1. A centrifugal separating machine including a housing provided with asludge channel and having an outlet communicating with the channel, arotary centrifugal basket having sludge discharge ports arranged todischarge sludge by centrifugal force into the said channel, a valvesleeve slidable on and rotating with the said basket and provided withportions arranged to cover and uncover the sludge ports, means forrotating the basket, means for operating the valve sleeve while thebasket is rotating, and blades mounted on the valve sleeve and operatingin the channel for sweeping the sludge through the channel to the saidoutlet.

2. A centrifugal separating machine including a housing provided with asubstantially annular sludge channel and having an outlet communieatingwith the channel, a horizontally disposed rotary centrifugalbaskethaving peripheral sludge discharge ports arranged to discharge sludge bycentrifugal force into the said channel, a valve sleeve slidable on androtating with the said basket and provided with portions arranged tocover and uncover the sludge ports, means for rotating the basket, meansfor operating the valve sleeve while the basket is rotating, and meansmounted on the valve sleeve and operating in the channel for sweepingthe sludge through the channel to the said outlet.

3. A centrifugal separating machine including a housing provided withoppositely disposed spaced annular troughs, a rotary centrifugal basketdisposed in the housing and having its ends operating over said troughs,said troughs having outlets, the basket having. an internal web dividingthe basket into separate sludge receiving chambers, means for supplyingthe sludge to said chambers, seepage means in the outer ends of saidchambers for discharge of eflluent from the chambers into the respectivetroughs, the chambers having sludge discharge ports in the side wallsthereof leading from the interior thereof, the housing means forrotating the basket, means to cover and uncover said sludge dischargeports and to maintain the said ports closed during separation of theThis arrangement of the liquids from the sludge material and foruncovering the sludge ports subsequent to separation of the liquids fromthe sludge for discharge of the separated sludge from the basket throughsaid sludge ports into said channel, and means for conveying thematerial through said channel, the channel having an outlet.-

4. A centrifugal separating machine including a casing provided with anefliuent receiving tank at its lower portion, a sludge receiving tank atits upper portion and an intermediate basket receiving chamber betweensaid tanks provided with annular efliuent receiving troughs at the sidesthereof, means for feeding material to said sludge receiving tank, abasket journaled inthe intermediate chamber of the casing and having itsends operating over said troughs, said troughs having communication withsaid effluent receiving tank, said intermediate chamber having inwardlydirected spaced annular flanges cooperating with the basket intermediatethe ends thereof to provide a sludge discharge channel having an outlet,said basket having an internal web dividing the basket into separatesludge receiving chambers, seepage means in the outer ends of saidchambers for discharge of efliuentfrom the basket chambers into'saidtroughs, said basket chambers having sludge discharge ports in the sidewalls thereof leading from the interior thereof and disposed inalignment with said sludge discharge channel, means to cover and uncoversaid sludge discharge ports, means for rotating the basket,

means for agitating the material in said sludge receiving tank, meansfor conveying the agitated material to either or both of said basketchambers, means for spreading the material delivered to the basketchambers toward the outer ends of the chambers, means operable touncover the ports of either chamber or both of them simultaneously forthe discharge by centrifugal action of the sludge separated from theliquids in the chambers of the basket to said sludge discharge channel,and means for feeding the material discharged into said sludge receivingchannel through the latter.

5. A centrifugal separating machine including a horizontally disposedrotary centrifugal basket provided with an imperforate transverse webdividing the basket into oppositely disposed chain-- bers and blockingthe chambers from communicover the sludge ports of one chamber only,means for rotating the basket, and means for operating the valve sleeveduring rotation-of the basket.

6. A centrifugal separating machine including a horizontally disposedrotary centrifugal basket "provided with an imperforate transverse webdividing the basket into oppositely disposed chambers and blocking thechambers from communication with each other at the inner ends thereof,the side walls of the basket having sludge discharge ports formedtherein leading from the chambers on opposite sides of said web, a shafton which said basket is secured, disks secured on said shaft and locatedon opposite sides of said web,.means .for supplying material to thechambers including pipes extending through the outer 50 cation with eachother at their inner ends, each l end walls of the respective chambersinto close proximity to said disks for discharge of the materialtherefrom against said disks as the basket and disks rotate, and a valvesleeve mounted intermediate the ends of the basket in embracing relationwith the basket for sliding movement on the side walls of the basketlaterally thereof in opposite directions to selectively cover anduncover the sludge ports of both chambers simul* taneously or to uncoverthe sludge ports of one chamber only, and means for operating the valvesleeve during rotation of the basket.

7. A centrifugal separating machine including a horizontally disposedrotary centrifugal basket provided with an internal web dividing thebasket into two separateside-by-side chambers, each chamber, beingprovided with seepage --means at the outer end wall thereof, means forsupplying material to the chambers for separation, means for rotatingthe basket to separate the liquids from the solids to build up a wall ofsolids against the interior surfaces of the side walls of the chambersfrom the outer ends of the latter to said web without seepage of thesolids through said seepage means and to discharge the liquids throughsaid seepage means as the basket rotates, the basket being providedintermediate its the seepage means and subsequently operable toseparated liquids from the chambers as the solids l are built up againstthe inner surface of the side walls of the chambers, each chamber havinga plurality of sludge discharge ports arranged in the side walls of thechambers and leading from the interior ofthe chambers for discharge ofthe built-up wall of solids from the chambers, and means normallyclosing said sludge discharge ports during the separating operation andoperable for movement away from said ports after the separatingoperation to effect discharge of the wall of solids through said portsby centrifugal force while the basket is rotating.

9. A centrifugal separating machine including a horizontally disposedrotary centrifugal basket provided with an internal web dividing thebasket into two separate side-by-side chambers, each chamber beingprovided with seepage means in the outer end wall thereof and eachhaving an annulrr series of sludge charge ports in its side wallsleading from the interior of the chambers adjacent to and on oppositessides of said web, the chambers being usable for se aration of materialtogether or independently f each other and said web blocking material inone chamber from passage into the other chamber, and means for feedingmaterial to the separate chambers for separation.

10. A centrifugal separating machine for dewatering sewage sludgesincluding a horizontal rotary centrifugal basket provided with animperforate transverse web dividing the basket into two side-by-sidechambers and preventing the passage of liquids and solids from onechamber to the other, whereby the two chambers are independently andsimultaneously operable, said basket being provided at the outer ends ofthe side chambers with seepage means and having openings in its sidewalls adjacent the transverse web and at opposite sides of the same forthe discharge of dewatered sludge, and means slidable on the peripheryof the basket for covering and uncovering the said openings to permitthe side chambers to discharge dewatered sludge simultaneously orindependently from the basket. 11. A centrifugal separating machine fordewatering sewage sludges including a horizontal rotary centrifugalbasket provided with an imperforate transverse web dividing the basketinto two side-by-side chambers and preventing the passage of liquids andsolids from one chamber to the other, whereby the two chambers areinde-. pendently and simultaneously operable, said basket being providedat the outer ends of the side chambers with seepage means and havingopenings in its side walls adjacent the transverse web andat oppositesides of the same for the discharge of dewatered sludge, and a valvesleeve slldable laterally on the periphery of the basket and havingopenings movable into and out of register with the sludge dischargeopenings of the basket to permit the chambers to discharge dewateredsludge either simultaneously or independently.

12. A centrifugal separating machine for dewatering sewage sludgesincluding a horizontal rotary centrifugal basket having an imperforateweb dividing the basket into separate side-by-side chambers andpreventing the passage of liquids and solids from one chamber to theother, whereby the chambers may be used simultaneously or independently,the chambers having outlets, vertically disposed disks arranged withinthe chambers and spaced from the imperforate web and rotating with thebasket, and sludge delivering means extending into the chambers from theends of the basket and including feed pipes having their ends adjacentthe disks and thereat laterally deflected and vertically elongated todischarge sludge against the vertical distributing disks.

13. A centrifugal separating machine for dewatering sewage sludgesincluding a horizontal rotary centrifugal basket having an imperforateweb dividing the basket into separate side-by-side chambers andpreventing the passage of liquids and solids from one chamber to theother, whereby the chambers may be used simultaneously or independently,said chambers having outlets and the basket being open at its ends,vertical distributing elements mounted within the chambers and rotatingwith the basket, and side feed pipes extending into the open ends of thebasket and having nozzles directed laterally of the pipes and locatedadjacent said distributing elements in position to discharge the sludgeagainst the same.

14. A centrifugal separating machine including a rotary centrifugalbasket having tapering ends and an intermediate annular portionpresenting an exterior substantially cylindrical surface provided withsludge discharge ports leading from the interior of the basket, seepagemeans in the ends of the basket leading from the interior thereof forthe passage of liquids from the basket, and an annular perforated valvemember slidable laterally of the basket on said substantiallycylindrical exterior intermediate surface of the basket to cover anduncover said sludge discharge ports.

15. A centrifugal separating machine including a basket having taperingends and an intermediate annular portion presenting an exteriorsubstantially cylindrical surface and provided with an interiortransverse imperforate web intermediate its ends dividing the basketinto separate chambers, said substantially cylindrical exterior surfacehaving sludge discharge ports arranged on opposite sides of saidtransverse web and leading from the interior of the chambers fordischarge of sludge therefrom, seepage means in one of the walls of eachchamber of the basket leading from the interior of the chambers for thepassage of liquids from the chambers, an annular perforated valve memberslidable laterally of the basket on said substantially cylindricalintermediate exterior surface to cover and uncover said sludge outletports,-means for supplying material to the chambers simultaneously orseparately, and means for operating said valve member for coaction ofthe perforations thereof with the .sludge discharge ports to dischargesludge, from the chambers simultaneously or separately While the basketis rotating.

16. A centrifugal separating machine including a housing, a rotarycentrifugal basket mounted in the housing provided withnon-communicating chambers and provided with seepage means at theirouter ends to permit seepage of liquids from the basket chambers andprovided adjacent their inner ends with separate sets of annular seriesof sludge discharge ports for the discharge of sludge from the chambersby centrifugal action of the basket, a valve means slidable on thebasket and having portions arranged to cover and uncover said ports andprovided with a groove, a shoe engaging the said groove, a rock shaftjournaled in the housing above the basket and having an arm pivotallyconnected with the said shoe for sliding said valve means to cover anduncover said sludge discharge'ports, and means for rotating the basket.

17. A centrifugal separating machine including a housing, a horizontalrotary centrifugal basket provided with non-communicating side chambersand having seepage means to permit seepage of liquids from the basketand provided at their inner ends with annular series of sludge dischargeports for discharging sludge from the chambers by centrifugal force asthe basket rotates, means for rotating the basket, a valve consisting ofa cylindrical sleeve slidable laterally on the basket and havingportions arranged to cover and uncover the sludge discharge ports andprovided with an annular groove, a rock shaft journaled in the housingabove the basket and provided with arms located at opposite sides of thebasket, shoes pivotally connected with the arms of the rock shaft andengaging the annular groove of the valve, and means for operating therock shaft to operate the valve sleeve.

18. A centrifugal separating machine including a housing provided with asubstantially annular sludge receiving channel having an outlet, ahorizontally disposed rotarycentrifugal basketv having an intermediateportion coacting with said channet and in such portion provided with asludge discharge port leading from the interior of the basket, means torotate the basket to separate liquids from solids and retain the solidsin the basket, a valve slidable on the basket between the ported portionthereof and said channel for covering and uncovering said sludgedischarge port to prevent discharge of sludge through said port duringthe separation of liquids from solids while the basket rotates andsubsequently operable to permit discharge of sludge through said portinto said channels while the basket rotates incident to centrifugalforce.

19. A centrifugal separating machine including a housing provided with asubstantially annular sludge receiving channel having an outlet, ahorizontally disposed rotary centrifugal basket having an intermediateportion coacting with said channel and in such portion provided with asludge discharge port leading from the interior of the basket, means torotate the basket to separate liquids from solids and retain the solidsin the basket, a valve slidable on the basket between the ported portionthereof and said channel for covering and uncovering said sludgedischarge port to prevent discharge of slucme through said port duringthe separation of liquids from solids while the basket rotates andsubsequently operable to permit discharge of sludge through said portinto said channels while the basket rotates incident to centrifugalforce, and means for positively carrying the sludge through said channelto and through the outlet of the channel.

20. A centrifugal separating machine including a housing, a rotarycentrifugal basket provided with tapering ends and an annularintermediate portion presenting an exterior substantially cylindricalsurface, a transversely disposed web in the basket dividing the basketinto separate noncommunicating chambers, seepage means in the chambersleading from the interior thereof for the discharge of liquids from thechambers, said exterior substantially cylindrical surface of the basketbeing provided with sludge discharge ports on opposite sides of said webleading from the separate chambers, the housing having inwardlydirectedsubstantially-annular flanges cooperating with the housing and with thebasket to provide a sludge discharge channel arranged in alignment withsaid sludge discharge ports, an annular perforated valve member slidablelaterally of the basket on said substantially cylindrical intermediatesurface of the basket to cover and uncover said sludge discharge portsseparately with relation to one chamber or the other or simultaneouslywith respect to both chambers while the basket rotates, said valve beinginterposed and operating between the periphery of the basket and saiddischarge channel, means for delivering material to the chambers of thebasket for the separation of liquids from the sludge, and means forrotating the basket.

21. A centrifugal separating machine including a housing provided with asubstantially annular sludge channel and having'an outlet communieatingwith the channel, a horizontal rotary centrifugal basket havingperipheral sludge discharge ports arranged to discharge sludge bycentrifugal force into the said channel, a valve sleeve slidable on androtating with the said basket and provided with portions arranged tocover and uncover the sludge ports, and blades mounted on the valvesleeve and operating in the channel for sweeping the sludge through thechannel to the said outlet, and means for rotating the basket.

22. A centrifugal separating machine including a substantiallycylindrical housing provided with removable side plates having inwardlyextending annular flanges approximately L-shaped in cross section andcooperating with the side plates to form annular eflluent troughs, ashaft extending across the housing and journaled in the side plates, ahorizontal rotary centrifugal-basket mounted on the said shaft andprovided at its ends with seepage means located in the planes of thesaid troughs and arranged to discharge liquid from the basket into thesaid troughs, and means for rotating the basket.

23. A centrifugal separating machine including a substantiallycylindrical housing provided with removable side plates having inwardlydirected annular flanges cooperating with the side plates to formannular eilluent troughs, a shaft extending across the housing andjournaled in said side plates, a horizontal rotary centrifugal basketmounted on said shaft and provided at each end with seepage meanslocated in the vertical planes of the said troughs and arranged todischarge liquid from the basket into the said troughs, and means forrotating the basket.

24. A centrifugal separating machine including a housing provided withside plates having vertically disposed annular flanges forming annulareilluent troughs, said side plates being also provided at the upperportions of the troughs with arched flanges having grooves to facilitatecollecting the efiluent, a horizontal rotary centrifugal basketoperating within the housing and provided with seepage means locatedwithin the vertical planes of said troughs for discharging liquid intothe same, and spaced curved vanes in the troughs to receive the impactof the eilluent discharged through said seepage means to conserve energyand to facilitate the collection of the efiluent in the troughs andgrooves and the draining of the effluent from the basket.

25. A centrifugal separating machine including a housing provided withside plates having vertically disposed annular flanges forming annulareiiluent troughs, said side plates being also provided at the upperportions of the troughs with arched flanges having grooves to facilitatecollecting the effluent, said annular flanges being also provided at thebottom with approximately semicircular gutters also for facilitatingcollecting eilluent, a horizontal rotary centrifugal basket operatingwithin the housing and having seepage means located in the verticalplanes of the annular flanges and adapted to discharge the seepageliquid into the said troughs, and spaced vanes in the troughs to receivethe impact of the efliuent discharged through said seepage means toconserve energy and to facilitate the collection of liquids tangentiallyof the basket into the troughs as the fluids are separated from thesludge during rotation of the basket, means for rotating the basket, andmeans for permitting discharge of the separated sludge from the basket.

27. A centrifugal separating machine including a housing provided withside plates having vertically disposed annular flanges forming annulareifluent troughs, said side plates being also provided at the upperportions-of the troughs with arched flanges having grooves to facilitatecollecting the eilluent, and a horizontal rotary centrifugal basketoperating within the housing and having seepage means located within theplanes of the said troughs for discharging liquid into the same.

28. A centrifugal separating machine including a housing provided withside plates having vertically disposed annular flanges forming annularefliuent troughs,,said side plates being also provided at the upperportions of the troughs with arched flanges having grooves tofacilitatecollecting the efiiuent, said annular flanges being also provided at thebottom with approximately semicircular gutters also for facilitatingcollecting efiiuent, and a horizontal rotary centrifugal basketoperating within the housing and having seepage means located in theplanes of the annular flanges and adapted to discharge the seepageliquid into the said troughs.

29. A centrifugal separating machine for dewatering sewage sludge andsimilar materials comprising a hollow base providing an efliuentreceiving tank, a housing supported upon the base, a mixing and treatingtank located above the housing and supportedby the same and providedwith means for feeding, cutting, "stirring and agitating the sludge fedto said mixing and treating tank including a rotary horizontal shaftprovided with blades, a horizontal rotary centrifugal basket operatingwithin the housing and having a horizontal shaft extending through thebasket andthe housing and journaled in the latter, valved means forconveying the treated-material in the mixing and treating tank throughthe housing and into the basket, means within the basket against whichthe treated material delivered to the basket impinges and by which thematerial is spread within the basket, troughs arranged within thehousing, seepage means leading from the interior of the basket wherebyto discharge liquids into said troughs, the troughs having'communication with said hollow base to deliver the liquids to the hollowbase, gearing for connecting one end of the horizontal shaft of thebasket with thehorizontal shaft of the mixing and treating tank, and amotor mounted upon the base of the machine adjacent the housing andclose coupled to the other end of the horizontal shaft of the basket.

. JOSEPH S. PECKER.

